Portable speaker system



FIG. 1 is a rear perspective view of a portable speaker system.

FIG. 2 is a front perspective view of the portable speaker system FIG. 1.

FIG. 3 is a rear elevational view of the portable speaker system of FIG. 1.

FIG. 4 is a front plan elevational view of the portable speaker system of FIG. 1.

FIG. 5 is a top plan view of the portable speaker system of FIG. 1.

FIG. 6 is a bottom plan view of the portable speaker system of FIG. 1.

FIG. 7 is a left side elevational view of the portable speaker system of FIG. 1.

The broken lines in the figures are for environmental purpose only and form no part of the claimed design. 

I claim the ornamental design for a portable speaker system, as shown and described. 